communication

nouns

the activity of communicating; the activity of conveying information
"they could not act without official communication from Moscow"
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something that is communicated by or to or between people or groups
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a general concept formed by extracting common features from specific examples
a connection allowing access between persons or places
"how many lines of communication can there be among four people?"; "a secret passageway provided communication between the two rooms"
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a relation between things or events (as in the case of one causing the other or sharing features with it)
"there was a connection between eating that pickle and having that nightmare"